9x^2+11x-124=0

Simple and best practice solution for 9x^2+11x-124=0 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 9x^2+11x-124=0 equation:


Simplifying
9x2 + 11x + -124 = 0

Reorder the terms:
-124 + 11x + 9x2 = 0

Solving
-124 + 11x + 9x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
9 the coefficient of the squared term: 

Divide each side by '9'.
-13.77777778 + 1.222222222x + x2 = 0

Move the constant term to the right:

Add '13.77777778' to each side of the equation.
-13.77777778 + 1.222222222x + 13.77777778 + x2 = 0 + 13.77777778

Reorder the terms:
-13.77777778 + 13.77777778 + 1.222222222x + x2 = 0 + 13.77777778

Combine like terms: -13.77777778 + 13.77777778 = 0.00000000
0.00000000 + 1.222222222x + x2 = 0 + 13.77777778
1.222222222x + x2 = 0 + 13.77777778

Combine like terms: 0 + 13.77777778 = 13.77777778
1.222222222x + x2 = 13.77777778

The x term is 1.222222222x.  Take half its coefficient (0.611111111).
Square it (0.3734567900) and add it to both sides.

Add '0.3734567900' to each side of the equation.
1.222222222x + 0.3734567900 + x2 = 13.77777778 + 0.3734567900

Reorder the terms:
0.3734567900 + 1.222222222x + x2 = 13.77777778 + 0.3734567900

Combine like terms: 13.77777778 + 0.3734567900 = 14.15123457
0.3734567900 + 1.222222222x + x2 = 14.15123457

Factor a perfect square on the left side:
(x + 0.611111111)(x + 0.611111111) = 14.15123457

Calculate the square root of the right side: 3.761812671

Break this problem into two subproblems by setting 
(x + 0.611111111) equal to 3.761812671 and -3.761812671.

Subproblem 1

x + 0.611111111 = 3.761812671 Simplifying x + 0.611111111 = 3.761812671 Reorder the terms: 0.611111111 + x = 3.761812671 Solving 0.611111111 + x = 3.761812671 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.611111111' to each side of the equation. 0.611111111 + -0.611111111 + x = 3.761812671 + -0.611111111 Combine like terms: 0.611111111 + -0.611111111 = 0.000000000 0.000000000 + x = 3.761812671 + -0.611111111 x = 3.761812671 + -0.611111111 Combine like terms: 3.761812671 + -0.611111111 = 3.15070156 x = 3.15070156 Simplifying x = 3.15070156

Subproblem 2

x + 0.611111111 = -3.761812671 Simplifying x + 0.611111111 = -3.761812671 Reorder the terms: 0.611111111 + x = -3.761812671 Solving 0.611111111 + x = -3.761812671 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.611111111' to each side of the equation. 0.611111111 + -0.611111111 + x = -3.761812671 + -0.611111111 Combine like terms: 0.611111111 + -0.611111111 = 0.000000000 0.000000000 + x = -3.761812671 + -0.611111111 x = -3.761812671 + -0.611111111 Combine like terms: -3.761812671 + -0.611111111 = -4.372923782 x = -4.372923782 Simplifying x = -4.372923782

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.15070156, -4.372923782}

See similar equations:

| 0.06(2x-1)-0.01(9x+6)=0.1 | | ln(4x^2)-ln(4)=ln(16) | | 3x+15=-34-5x | | 2w^2+2w-45=0 | | 6x^2+5x-8-8x^2-2x-10=0 | | 2(4x-7)=1 | | 3+10x=21+1x | | x-5y=-1fory | | -8+log-8n=-8 | | n^2*n^2*n=0 | | 4x+3=360 | | 0.5x+22=y | | 17=3k | | X-10=200 | | ln(4)-ln(x+9)=3 | | 74-7b=11 | | 2=3(w+4)-5w | | P=8.65h | | 4x+10+3x+31+4x-8+7x-23+3x+5=180 | | a+(a-2)=(a-5)-(a+3) | | 3(3x-3)=33 | | 4x^2+12x+9=9 | | 5x+3x^2-2x+6x^2= | | 4x+8=280 | | 835=275+n | | 360-79-79= | | 3=75h+10 | | 2(3a-7)= | | 13=3k-(-4) | | 55x+65= | | 0.6(x-2)=11.4 | | -2=-3x+2 |

Equations solver categories